I think that this is the effect of the flashing lights being at 18 per second and the camera filming 25 frames per second. There’s a mis-match in what the camera is taking pictures of and what the human eye would have been “taking pictures” of.

In fairness, this is one of the few situations where holding the camera vertically is entirely justified. The iPhone’s rolling shutter would have resulted in horribly distorted images if it had been shot horizontally.

Richard, it’s in the Hollywood Land portion of California. Big tall sign out front that says Disney Animation. Very cool exhibit…well worth the time. The Zoetrope is in the Character Closeup section. Here’s a link:http://disneyland.disney.go.com/disneys-california-adventure/disney-animation/
I’ve seen this in person and video just can’t do it justice. It’s amazing how convincing it is in person.